Hi my name is ***** ***** I will be the expert working with you today to help resolve the problem you have posted.
I am sorry to hear that you are facing problem with your Logitech webcam on skype.
you mean the video is fine and the mic is not working is that correct.
let me know when you are ready we will check the mic settings.
Follow these steps
Open skype click on tools on the top and select options now on the left click on audio settings and select the microphone as Microphone HD Webcam C615 click save and exit